Isochrons, phase response and synchronization dynamics of tunable photonic oscillators

The global structure of the isochrons and the corresponding phase response curves are investigated and numerically computed for the fundamental photonic oscillator consisting of an optically injected laser. Their crucial role in the synchronization dynamics under a periodic modulation of the injection beam is shown, along with their capability for providing conditions for stable phase locking and periodic outputs with discrete equidistant spectra in the form of frequency combs.